PA -
You probably know (so this is for those that don't) that the purposed of Fajens design with the Big Shot was to be able to use a push-pull two-handed hold on the Contenders. It does stabilize some, but its awkward, at least until you get used to it. I'd bet it helped some folks, especially those new to handuns, but it was just too different for some of us old handgun hunters to switch to. I was just much more comfortable two-handed with the other grip methods that I had used on Contenders for years (starting about 43 years ago to be exact). Fajen did a great job of finishing them as you suggested, and when they said finished drop-in you got a finished drop-in that fit perfectly and was well finished - not a stock that you had to tweek to fit or fix finish blems on. I probably shouldn't mention Richards Never-Fit or Boyds Might-fit since some folks like their stocks. LOL IMO, Fajen were by far the best mostly "duplicator" stock maker in this country, and better than any that have come after the family sold it. They were a great company to deal with too. You could get the family on the phone and that was a hoot (like talking to old George at Herter's was). I used a lot of their rifle stocks over the years to doll up factory firearms before I could afford custom stocks and firearms, so a lot of their rifle stocks passed through my safes as well as XP-100 and TC Contender sets.
As much as I " thought" I knew about Fajen stocks, I was corrected some time back on a custom Sako L461 222 Rem Vixen I have, that because of a design that resembles the Fajen Thumbhole Sporter, cut checkering and finish I thought it was a Vixen/Vixen Deluxe that somebody had the premium barrel put on, had he action tuned and added a Fajen near exhibition grade stock to. A couple of far more knowledgeable Sako collectors than me told me it has a pretty rare Sako custom shop stock instead, and that it added greatly to its value. I was fine with it just having a nice Fajen stock myself.
Still have an old Fajen catalog that's fun to leaf through sometimes out in my storage garages someplace, if for no other reason than to remember old times and what a great family they were to do business with.
L.